If you can use a word processor, you can use a wiki!
Visitors & authors can see a history of changes and revert to earlier versions.
Visitors can discuss the page in a threaded forum.
Editors can bring in content from around the web through embedding.
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If you're not clear on what a wiki is, this excellent video from Common Craft explains it in simple terms.
Take a look at the educational wikis wiki to see what some of your peers are doing. It's a wiki, too, so you can contribute your own examples and ideas. You may also want to check out the Wiki Walk-Through from TeachersFirst.
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"Wiki While you Work"
Free Wikis for K–12 Educators
Wikis
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Educational Uses of Wikis
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